Regards, Oussana. First advice: Update your HBase installation to a more recent version like 0.94.9 for example: https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12310753&version=12324431
The problem with EMR is the version for HBase is very old, so, it would be nice instead EC2 for HBase with a recent version. See the official docummentation here: http://docs.aws.amazon.com/ElasticMapReduce/latest/DeveloperGuide/emr-hbase-launch.html See these tips too: http://aws-musings.com/7-tips-for-running-hbase-in-ec2/ HBase use-cases in the last HBaseCon 2013. http://www.orzota.com/hbase-use-cases/ http://comments.gmane.org/gmane.comp.java.hadoop.hbase.user/35001 My favorite is the HBase at Pinterest talk: http://www.hbasecon.com/sessions/apache-hbase-operations-at-pinterest/ http://www.slideshare.net/cloudera/operations-session-1 2013/7/22, Oussama Jilal <[email protected]>: > Hello, I need some help with my issue, > > We have been running HBase on Amazon EMR (v 0.92) for quite some months, > today we had a serious problem, Hbase was throwing some "connection > refused" errors in out client applications, after some investigation, we > found out that one of the two EC2 instances running hbase (the > slave/regionserver one) was disk full (800+ G), we can connect to both > of the instances, but when we try to run a command from the HBase Shell > (list, scan, disable, truncate ... anything) we only get errors like : > > 13/07/22 14:06:29 INFO httpclient.HttpMethodDirector: I/O exception > (java.net.ConnectException) caught when processing request: Connection > refused > 13/07/22 14:06:29 INFO httpclient.HttpMethodDirector: Retrying request > > We want to truncate some tables and gz compress some column families but > we can't do any operation. > > Executing the command "jps" on the master returns : > > 6966 Jps > 1968 JobTracker > 2177 HQuorumPeer > 1814 NameNode > 4623 HMaster > > but on the region server it only return : > > 5986 Jps > > Rebooting didn't help ... > > Any one can help ? We are not very experienced with HBase, especially > administration. > > Thank you. > -- Marcos Ortiz Valmaseda Product Manager at PDVSA http://about.me/marcosortiz
